DE1197053B - Control device for washing machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

D06f

German El .: 8 d-9/60

Number: 1197053

File number: B 64516 VII a / 8 d

Filing date: October 25, 1961

Opening day: July 22, 1965

The invention relates to a control device for washing machines with at least one drive motor for the washing device and with automatic control of a selectable washing program, the washing temperature by setting a final temperature selector switch to a Minimum temperature and at least one higher temperature can be preselected and the washing duration is controlled by a timer.

In washing machines of the type mentioned, a significant improvement can be achieved if according to the invention, the device for adjusting the final temperature selector switch with two or several switches lying parallel to one another in the circuit of the washing machine motor which are closed one after the other when adjusting the end temperature 'selector switch and that a switch operated by a timer is placed in series with each of these switches, so that when setting the final temperature selector switch to increasingly higher liquor temperatures increasingly longer washing times result. Only then does the Zeitwerk begin in the familiar way run when the liquor has reached the set temperature.

This ensures that when selecting the maximum washing liquor temperature, which is to be carried out by hand a corresponding washing time is also set automatically and simultaneously. For example, when choosing a low temperature, this in turn depends on the sensitivity depends on the items to be washed, the washing time is also shortened, while on the other hand when selecting a high washing water temperature, for example for insensitive and heavily soiled Laundry comes into consideration, and the washing time is extended accordingly. Through the automatic control of the washing time is the choice and activity for the housewife Setting the washing time decreased, so that the washing cycle corresponding to the respective type and degree of soiling of the laundry on the one hand with the necessary cleaning effect and on the other hand with the greatest possible protection of the Laundry runs out.

In the drawing, the subject matter of the invention is illustrated using an exemplary embodiment. It shows

F i g. 1 is a side view, partly in section, and

FIG. 2 shows a section along line II-II in FIG. 1 a preselector for the detergent temperature control device for washing machines

Applicant:

Robert Bosch G. m. B. H.,

Stuttgart 1, Breitscheidstr. 4th

Named as inventor:
Otto Herrmann, Stuttgart-Botnang;
Theodor Beißwänger, corn west hen;
Edwin Kunzelmann, Stuttgart-Rohr

door with additional device for setting the washing time,

F i g. 3 shows an electrical circuit diagram of the device.

In the housing 1 is a per se known temperature sensitive Arranged switch, which is controlled by an expansion medium, which is arranged in the housing 1, not shown membrane capsule, a bendable tube 2 and a sensor 3 fills, which in the washing liquor to be heated a Not shown tub of a washing machine protrudes. The membrane capsule expands when the expansion medium is heated and actuates an electrical snap-action switch that activates the electrical heating switches off. The respectively desired final temperature of the washing liquor, i.e. the The response temperature of the switch arranged in the housing 1 can be set by rotating a shaft 4 which is provided with an operating handle 5 indicated by dashed lines.

On the housing 1 of the temperature switch, the web of a U-shaped bent bracket 6 is attached, the legs of which are connected to a switching device which has two spaced parallel plates 7, 8, between which an insulating washer 9 by bolts 10 and spacer tubes 11 is clamped. Two of the spacer tubes each have a longitudinal slot 12. The opposite longitudinal edges of the insulating material disk 9 engage in these two longitudinal slots. Two snap-action switches S and 5 ″ sit one above the other on the insulating disk, each of which has two curved connection contact rails 13 and 13 ′.

From Fig. 2 the upper (S) of the two snap switches can be seen. The lower one (S ') is designed in the same way. The contact bar 13 'carries at one end 14 a contact 15, the one in the

509 627/61

Claims (2)

3 4 Insulating material washer adjustable screw 16 with respect to 33 and 34 coming voltage is thus applied overrides. The end facing the contact 15 only to the movable switching element of the switch Screw 16 serves as a stop for a moving 37. This is set when the borrowed contact 17, the one at one end of a metal wash cycle from the timer strip, not shown 18 sits, the other end of which is closed for a short time at a plant, whereupon the Um-Arm 19 of the contact bar 13 is supported so that the control unit comes into action, and caused by the Metal strip 18 around its support point pivoting contacts 38 that the motor during the closing is. Furthermore, a shift lever 20 is on the outer duration of the contact 37 alternately in one or The end of the arm 19 is pivotably supported and is switched on to the other direction of rotation. After a which engages one end of a coil spring 21, 10 relatively short, entderen the delicate cycle the other end with the metal strip 18 in the speaking duty cycle becomes the switch 37 Proximity of contact 17 is connected. In the in by the timer again opened so that the 2, the switch parts of the reversing device are de-energized and the motor 39 the spring 21 strives to stop the contact 17 against the. Until the end of the set pro-stop screw 16 to draw. Switches 36 and 35 become 15 grams On the shaft 4, an insulating body 22 is temporarily closed by the timer. Two cam disks 23, 24 are arranged here. The in at is, for example, when the switch 37 F i g is opened. 1 overhead cam disk 23 has one of the switches 36 closed and held in the closed position for a certain segment of a circle with the angle α as the control path, while time. When opening the cam disk 24 underneath 20 of the switch 36, the switch 35 is then closed-circle segment with the angle β as a control path and has a certain time in the closed position. When rotating the shaft 4 to adjust the held. However, since the snap-action switches S and S 'are temperature switches and the cam disks are open, the motor 39 cannot input 23, 24 accordingly, whose control path is switched. The washing drum therefore appears to be in the range of motion of the switching lever 20 of its snap switch S or S ″ which is still assigned to this section of the washing program. Shaft 4 can be set in four switch positions. If shaft 4 is selected when washing, which is indicated in FIG. 2 by 0, I, II and III programs, it is indicated in switch position II (see FIG. 2). The position 0 corresponds to that in FIG. 2 represents, the cam disk 24 pivots the illustrated switch-off position. In the position I, 30 switching lever 20 of the associated snap switch S ', as explained below, a gentle cycle is switched to the switched-on position. The consequence of this is that that is switched when the two switches S and S 'are still switched on to the power supply. In position II, the cam remains closed when the switch 36 of the time disk 24 closes the switching lever 20 of the switch S 'of the switching mechanism. The washing motor 39 is pivoted about its pivot point so that the 35 is therefore a correspondingly longer period of time than spring 21 has caused the jerky switching of the contact in the previously described setting alternately into its switched-on position, so that selnd switched on in one direction and the other, this touches its mating contact 15. When the shaft 4 is in switching position III (FIG. 2) switching position III, the cam disk 23 has also pivoted, so the cam disk 23 also switches the switch 5 on. 40 the switch S on , so that the associated contact 17 As shown in FIG. 3 can be seen, switches on via which its counter contact 15 is touched. This has the consequence Line 30 connected to the power source so that the changeover switch also when the switch 35 is closed 31 remains connected to the power supply when the washing machine is started up, initially only the water valve 32, which is a further extension of the duty cycle the wash tank fills with water. As soon as the 45 of the engine entails. Instead of the two cam disks 23 and 24, the movable switching element 33 of the switch 31 could of course also be switched to three or more cam disk contacts 34, whereby the power supply and a corresponding number of switches to the control unit the washing machine should be switched on when the washing machine becomes more on. In this way, the movable conical washing programs are also supplied with voltage, as in the case of the snap switch S and 5 'in the case of the beschrietaktel7. has benen embodiment. Furthermore, a further switch 35 could also be provided or connected downstream of each snap-action switch, which, together with one, has several control studs that act on every third switch 37 from one switch, not shown in detail, on another switch. The th time switch of the washing machine controlled 55 cam disk could also be designed in the shape of a cup. The switch-on contacts of the switches 35, 36 and at their edge one or more control and 37 are connected to a reversing device (not shown is a stool for operating one or more switches), which has the direction of rotation of the switch,
drive motor 39 of the washing machine in itself known way alternately by means of the contacts 38 60 patent claims: switches. 1. Control device for washing machines with To switch on the gentle cycle, the at least one drive motor for the washing shaft 4 is taken from the circuit shown in FIG. 2 indicated position 0 in the device and with automatic control of the position I rotated, in the, as mentioned above, selectable washing program, whereby none of the cams 23 and 24 you pull them 65 washing temperature by setting a final snap switch S or S ' closes. These temperature selector switches on a minimum temperature are both snap switches, as in FIG. 3 temperature and at least one higher temperature indicated, still open in position I. Which can be preselected from 30 and the washing duration by a Time switch mechanism is controlled, characterized in that the operating handle (5) for adjusting the final temperature selector switch is coupled to two or more switches (S, S ') lying parallel to one another in the circuit of the washing machine motor (39), which when adjusting the final temperature Selector switches are closed one after the other and that in series with each of these switches a switch (35, 36) operated by a timer is placed, so that when the final temperature selector switch is set to increasingly higher liquor temperatures, increasingly longer washing times result. 2. Control device according to claim 1, wherein the end temperature selector switch is adjustable by a manually operable rotary shaft with increasing adjustment angle to increasingly higher temperatures, characterized in that the rotary shaft (4) Schaltgüeder (23, 24) are connected to the As the adjustment angle of the rotary shaft increases, the switches (S, S ') arranged parallel to one another in the motor current price close one after the other. Considered publications:
German patent specification No. 886 621. 1 sheet of drawings S09 627/61 7.65 © Bundesdruckerei Berlin